TechnologyOpenZeppelin and ERC-3643: how a security token is built
What OpenZeppelin libraries and ERC-3643 controls provide, and what a securities issuance also requires: rights, permissions, operations and review.
Blockchain technology and Web3
Solidity, smart contracts, ZK proofs, EVM infrastructure and Web3 stack. Technical articles from the Metlabs blockchain engineering team.
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TechnologySolana with Rust and Anchor: how to build in 2026
Why Solana is built in Rust, what Anchor adds over native Rust and when Pinocchio pays off to squeeze a program's compute budget.
Technologyethers.js vs viem: which one to use in your 2026 project
Compare ethers.js and viem interfaces, ABI-derived types and migration costs. Assess performance with the actual project and versions.
TechnologyHardhat vs Foundry: which to choose in 2026
Solidity and TypeScript tests, fuzzing, plugins and deployments: criteria for comparing Hardhat 3 and Foundry without context-free benchmarks.
TechnologyIPFS vs Arweave: which to choose for decentralized storage
What a CID identifies, who maintains a copy and how IPFS pinning differs from Arweave’s storage model.
TechnologyWhere to Find Blockchain Development Freelancers in Spain (2026)
How to hire a blockchain freelancer in Spain: assess experience, compare budgets and define deliverables, access and maintenance.
TechnologyHow Much Does a Blockchain Developer Earn in 2026?
How to compare blockchain developer salaries by responsibilities, market and contract, and distinguish base pay from conditional compensation.
TechnologyHow to build smart contracts and Mini Apps with TON
Architecture for a Mini App with TON: Tolk, messages, Telegram validation, wallet connections and testing before deployment.
TechnologyERC-7683 in 2026: how cross-chain resolvers and solvers work
The current ERC-7683 specification without obsolete interfaces: opaque orders, resolvers, a common representation, solvers and security limits.
TechnologyPolkadot vs Polygon PoS: architecture, security and differences
Polkadot versus Polygon PoS: shared security, EVM execution, coretime, bridges and criteria for choosing a project architecture.
TechnologyEIP-7732: what ePBS changes in Ethereum
What EIP-7732 proposes for Ethereum proposers, builders and validators, and how to distinguish its specification from an actual activation.
TechnologyDencun: the Ethereum upgrade of March 2024 explained
Ethereum Dencun: what changed in March 2024, the nine included EIPs and how blobs affect Layer 2 costs.
